Operating means for closures



Jan. 7, 1930. G E MOCAW 1,742,713

OPERATING MEANS FOR CLOSURES Filed July 20, 1928 2 Sheets-Sheet 1 [NVENTOR BY I 682 iii/7 6w Jan. 7, 1930. MccAW 1,742,713

OPERATING MEANS FOR CLOSURES filed July 20, 1928 2 Sheets-Sheet 2 -ZZ'LIZI INVENTOR W4 A TTOQRNEY Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE.

GUY E. MGCAW, OF WALLA WALLA, WASHINGTON OPERATING MEANS FOR CLOSURES Application filed July 20,

This invention relates to operating means for closures, more particularly for closures of the class of large gates and garage doors, etc. and has as one of its objects to provide ii an operating means that is expansible and reversible to fitany ordinary sized gate post, or upright members, and to accommodate a closure having a right and left hand swin Another object of the invention is to prol1) vide an operatingmeans for closures that is selfaligning and hence is simple to install.

it further object of the invention is to provide an operating means that will permit a limited movement of the closure independent of the operating means.

A further object of the invention is to provide an operating means that will afford easy and positive operation.

a further ob ect of the invention is to proride an operating means providing for remote control.

A further object of the invention is to provide an operating means that will provide for latching the closure for securement and that will automatically operate the latching means as a preliminary to openlng or closing the closure.

With these and other objects in view, reference is now had to the accompanying drawings in which Fig. l is a front elevation of a gate showing the application of the operating means;

Fig. is a back view of the operating means;

Fig. 3 is a side elevation showing the drivdrum;

1,1 5. l is a front elevation showing the aligning means, with the closure broken away;

1928. Serial No. 294,111.

numerals refer to like parts throughout the several views, and the numeral 1 refers to a closure of the nature of a gate, in this case, the gate consisting of a frame 2, the upright backpiece 3 of which is preferably of cylindrical cross-section, as shown plainly in Fig. 7, for a purpose to be explained.

The gate may be completed with a wire screen at of large mesh, as shown, and is provided with the usual upright members positioned at each end of the gate when closed, one of which members will be termed the latch-post 5, being intended to secure the gate at its free end when closed, and the other of which will be termed the hinge-post 6, to which latter the supporting structure and the operating means which go to makeup this invention, are to be secured;

Attached preferably at the upper end of the backpiece 3 is an operating arm 7 which extends in-a general direction perpendicular to the closure 1 and which consists preferably of a single piece of metal bent back upon itself and having its two ends 8 shaped to conform to'the cross-sectional shape of the backpiece 3 to which it is rigidly and adjust-ably secured by means of bolts 9 as shown plainly in Figs. 5 and 6' andin which it is evident that adjustment of the arm with relation to the gate may obtain by rotating the arm on its cylindrical bearing then rigidly securing it in the desired position by means of theabove mentioned bolts. With the arm rigidly secured to the closure, in the above mentioned manner, it is evident that upon the movement of this arm in a horizontal plane, that a similar movement will be imparted to the closure to cause it to swing in the usual manner of closures.

For the purpose of supporting the closure, a supporting structure 10 is provided which consists of a lower hinge yoke 11 comprising a plate 12 having wings 13 extended, forming a U-shaped yoke wherein to carry a bolt 14 adapted to provide a pivot upon which the lower hinge of the closure will swing, and with the plate extended and shaped to provide a cleat 15, formed integral with the plate, which cleat provides an aligning means, that registering with the hinge-post on two sides thereof, properly positions that member during assembly, and, positioned in a line corresponding to the line of this lower yoke, is an upper hinge yoke 16 having wings extended in a similar manner to that described for the lower hinge yoke, and this hinge yoke may obviously be formed independent of, and for association with one of .a pair of bearing plates'l'l' attached to said post6, or may be integral therewith." This bearing plate is likewise provided witha cleat l8 similar to the cleat of the lower hinge yoke, and for aligning purposes 1 and where the upper hinge yoke is constructed as a separate member from that 'of'the'bearin'g plate, the bearing plate is ofi-set, as-at 19, to accommodate and seat this yoke, as shown in Fig.6, andhence this cleat, with the beforementioned cleat 15 of the lower hinge yoke, will provide an aligning means by which perfect alignment of these two parts will obtainto properly hinge and carry the closure.

As will be noted, the bearing plates 17 above referred to consist of two separate members, and both these members have their like ends extended to provide bearing arms 20 in which bearings 21 are formed to receive a portion of an operating mechanism, to be explained, whereby the bearing will be extended a distance greater than the reasonable dimensions of the hinge-post 6, the intent being to avoid contact with a post having greater or less dimensions, and thus as these bearing plates are independent members, and as these members are secured to opposite sides ofthepost, it is obvious that the supporting structure is not restricted to use on a certain sized post and is therefore expansible; and as the lower hinge yoke 11 is a separate member it is likewise obvious that the supporting structure may be expanded to receive closures having various heights 0r dimensions.

The bearing plates 17 are of similar dimensions and differ only in that one of the plates is provided with the upper hinge yoke 16 while the other plate is provided with pulleys .22 positioned opposite to this yoke and adapt ed for a purpose to be explained, and these parts, together with the bearings mentioned, arepositioned centrally in the bearing plates and iniline to permit these. plates to be reversed, and by this arran ement together with the fact that it is expansible an operating means isprovided that is universal in its application.

The hinging means 23 above referred to may consist of any suitable device adapted to be secured around the pivot for association with the yokes of.the structure, or mayconsist ofstraps 24 formed as shown in Fig. 7 which straps are secured rigidly to the backpiece 3 of the frame 2 and loosely about the bolt'l l forming the pivot, thus providing for hinged cooperation with the respective yokes of the supporting means.

Operably associated with the supporting" structure, is an operating mechanism which consists of an operating lever 25 positioned in operable juxtaposition with, and practically parallel to said operating arm 7 and consists preferably of a sheet metal structure adapted for pivotal mounting upon the bolt 14 of the-:upper hinge member, with one of its ends providing an outwardly extending main lever 26 and with its other end providingv an inwardly extending lever 27, to which last named lever a pitman 28 is operably attached at assembly in the usual manner of such construction.

Mounted inthe above mentioned bearings 21 provided in the bearing arms is a shaft 29, adapted for rotation therein, and this shaft is preferably provided with excess length, as shown in Fig. 8, as a further provision for expansion, and to provide for proper alignment of the shaft one of the bearing arms is bent back, as shown at 30 in Fig. 5, in a mannor to provide two precisely aligned hearings in one member by which the ali nment with the bearing of the second member may be readily accomplished during the assembly and mounting of the device.

One end of. this shaft is provided preferably with a disc '31 rigidly secured thereto, and this disc carries a pitman pin 32 upon which is mounted a block 33 and in this block and at rightangles to the pin is provided means to reeeivethe end of the pitman 28 in a manner to provide a universal joint wherewith to accommodate the pitman and provide free movement thereof during the operation of imparting a reciprocating movement to the above mentioned operating lever 25.

Loosely mounted on theshaft and positioned opposite to the disc is a driving drum 34 arranged thereon to impart a single directional movement to said shaft by a recipro eating movement of the drum, and for this purposethe drum is provided with a cam 35 rigidly secured to said shaft and positioned within the drum, which cam consists preferably of parallelly positioned bars 36, each of said bars having one of its ends extended beyond the other to provide diametrally positioned dogs 37 adapted to be engaged by acatch hook 38 attached to the drum and provided with a spring 39, whereby at the beginning of a partial rotation of said drum the catch hook will engage one dog of said cam whence by the reciprocation of said drum, the shaft will be rotated in a certain direction, the shaft thereby having a single directional movement, provided by a reciprocating movement of the drum. or at each ultimate half revolution of said drum. I

As it is essential that the operating lever 25 shall move in its horizontal plane through anarc of ninety degrees, a means is provided to stop and secure the pitman 28 at the completion of each reciprocation, and 1 this means consists of a spring member 40 operating lever, with springs 44 mounted on said bolt and on each side of the operating arm, in opposed relation, by which means the inertia of the closure is yieldingly overcome during the operation of the device and in addition to this, a limited movement of the closure may be obtained independent of the operating mechanism to a degree, as shown by the dotted lines in Fig. 6. This arrangement of the yielding connecting means provides for a movement oft-he free end of the closure sufficient to pass a person, or, when applied to gates, would permit the passage of animals in single file without the necessity of recourse to the controlling means which will now be explained.

The controlling means consists of pulling cords 45 extended in opposite directions as shown in Figs. 2 and 4, for manipulation from either side of the closure, and these cords are joined to continue as a single cord 46, as shown in these figures, with its single end being passed approximately one half way around the drum 34 where it is secured to the drum by means of a clip 47 made a part of the drum for the purpose, and by which means the drum may be operated to move in one direction practically the length of that portion of the cord which normally lays in contact with thedrum, and the position of the clip on the drum insuch that the drum will be controlled to rotate one-half revolution only, and sufficient to rotate the shaft and disc until the V-notches of said disc shall *come into successive engagement with the to automatically accomplish this purpose which means consists of a counter weight 48 suspended by a cord 49, the other end of which cord being secured to the drum in a like manner to that of the pulling cord, and both of these cords are guided by the above mentioned pulleys 22 attached to one of said bearing plates for the purpose.

Obviously where the pulling cords are to be elevated for convenient use, the hinge post may be extended upward the proper distance and other pulleys 50 attached thereto as a further guide for the cords, and the outer ends of these pullings cords may be supported in the usual manner by posts (not shown as they are old in the art). Where it is desired that the closure be secured in the closed or open position, or both, a latching means will be provided therefor which consists of a hook 51 secured to the latch post with the latch being completed by means of a tongue 52 pivotally attached to the closure for engagement with the hook, with thetongue being continued to provide a lever 53in the nature of a bell- 575 crank, to which lever a cord or Wire 54 is at tached, this cord extending inward to the hinge post to be there secured to a tripping arm 55 pivotally mounted on said shaft 29,

and this arm is bent to provide a depending tripping lever 56, normally positioned adjacent to said drum.

For the purpose of operating this tripping lever, and prior to the operation of the closure, a wedge-shaped piece 57 of any suitable material is secured to the'drum (see Fig. 8) in a manner that the initial movement of the drum will move the tripping lever outward, which movement of that member will impart a corresponding movement to the tripping arm, when this movement in turn will'operate to draw the wire 54 and release the latch. As the movement of this arm and lever must necessarily be limited as regardsthe movement of the drum, a second wedge-shaped piece 58 is attached to one of the plates whereby and by the proper location of which the movement of the tripping lever will tend to move the lever in a longitudinal direction on the shaft, and a spring 59 is then mounted on this shaft to return the tripping lever to its original position after the tripping lever has been moved to a position of-esca pe from the wedge shaped piece attached to the drum.

In use the lower hinge yoke is rigidly se- 17 cured to the hinge post at the desired distance from the ground to properly accommodate the gate or other closures, and this being accomplished the upper hinge yoke and its attendant bearing plate is secured to the hinge post, the cleats now providing for proper alignment of these yokes. When this is accomplished the shaft is inserted in the double bearing of the extended arm of this first bearing plate.

It is now obvious that all parts are propbearing plate and the second bearing plate' is then placed upon the shaft and secured to the post in a manner similar to that of the erly aligned and assembly may then be com pleted by mounting the cam securely upon the shaft together with the drum in which the cam is housed. The pulling cords are now trained through their proper rollers and the single end of the cord is secured to the cleat on the drum. When this is completed the counter weight and cord are similarly attached to the drum when the supporting structure is ready to receive the hinges of the closure,

The hinges-are'now mounted=inthe hinge -yokes and fixed therein by the respective bolts and the upper of which bolts is passed through the operating lever to hold that mem- 4 beras'wellwas'tosecure the hinge. The operating lever and the operating arm ra-reanow :connected together in the manner abovei'mentioned andthe latch'cordis then attacliedrto the abellecr-ank ofxthe latch and is then connected with thektripping arm for operation by the tripping lever and the drum.

.Now, in operation, the closure is approached until-the-end of one of the pulling ,cords m'aybe conveniently seized when that cord will be pulled :witli'a result that the "drum will be:rotated approximately half'a revolution and during this vmovement the latch'hook-will engage the cam and'tlie wedge piece attached to thedrum will engage the tripping lever and the'initial'moveinent of the drum vwill thus relea'se the latch when the continued movement of the drum would complete the movement of the closure through an arc of ninety degrees, this movement ceasing as the downwardly turned portion of the spring member seats in the V-slot of: the disc.

During this movement of'tliedrum, it i has raised 1 the weight and upon the release of the'pulling-cordthe weight'now returns .thedrum to its normal position, when the 'device is again ready for operation.

Obviously a crank, gears'or an eccentric may besubstituted tor thefdisc 31 andpitmanpin withoutdeparting from the spirit of my invention. 7

Having thus described :my invention, '1 claim- 1. An operating means orclosures, comprising, with upright members-an operating armrigidly and adjustably attached to said closure, a supporting structure attached to one of said upright members :andconsisting of a lower hinge yoke, and bearing plates having an upper hingeyoke associated with one of said bearing plates, hinging means rigidly attached to said closure and mounted insaid yokes, an operating mechanism associated with said supporting structure and provided with an operating lever, means yieldingly connecting said operating arm and-said operating lever and adapted toperinit a limited movement of said closure independent of said operating mechanism, and means to. remotely control said operating mechanism.

Anoperating means f-orclosures, comprising upriglit members,=an operating arm rigidly and adjustably attached to said closure and extended in a; general direction perpendicular thereto, a supporting structure attached toone of said: upright members and consisting-of a lower hinge yoke, and

bearing plates, and an upper hinge yoke formed integral with one of said plates, and $3 having means to automatically align said hinge yokesand said bearing plates, hinging V meansrigidly attached to said closure and pivotally mounted in said-yokes, an operating mechanism associated with said supporting structure and, providedwith an operating levar positioned in operable juxtaposition with said operating arm, means yieldingly connecting said operating arm and said operating leverand adapted to permit a limited movement of said closure independent of said operating HIGCllZLDlSDl, and means to remotely control the operating mechanism.

3. An operatingmeans'foi' closures, comprising upright members, an operating arm rigidly attached to said closure and extend- 30 ed in a-generaldirection perpendicular thereto, an-expansible supporting structure attached to one of saidupright membersiand consisting of a lower hinge yoke, and bearing plates having extended bearing arms, 5 and having an-upper hinge yoke formed in-' tcgral with one of said bearing plates,:means to automatically align said bearing arms,

and cleats formed integral with and adapted to align said yokes on said upright member, .90 hinging means rigidly attached to said closure and pivotally mounted in said yokes,

an operating mechanism associated with said supporting structure, and provided with an operating lever pivotally mounted in one of -96 said yokes in operable juxtaposition with said operating arm, means yieldingly connecting said operating arm andsaid operating lever, and means to remotely control said operating mechanism. ,100

l. An operating means for closures, comprising upright members, an operating arm rigidly attached to said closure and extended in a general 'direction perpendicular thereto, an expansible supporting structure attached. to one of said upright members and consisting of a lower hinge yoke and bearing I plates having extended bearing arms, and

having an upper hinge yoke formed integral with one of said bearing plates, means to 3110 :automaticallly alignsaid bearing arms, and cleats formed integral with and adapted to align said yokes on said upright member,

said hinge yokes, and normally positioned in a general direction parallelto said operating arm, means yieldingly connecting said operating arm and said operating lever to yield- ..ingly overcome the inertia of said closure,

and to permit a limited movement of said closure independent of said operating mech- .anism, and means to remotely control said operating mechanism.

5. Anoperating means for closures, comprising upright members, an operating arm rigidly attached to said closure and extended in a general direction perpendicular thereautomatically align said bearing arms, and

cleats formed integral with and adapted to align said yokes on said upright member,

hinging means rigidly attached to said closure and pivotally mounted in said yokes, an operating mechanism associated with said supporting structure, and provided with an operating lever pivotally mounted in one of said hinge yokes in juxtaposition with said operating arm, and provided with means to rotate said lever in a plane about its pivot, means yieldingly, connecting said operating arm and said operating lever to yieldingly overcome the inertia of said closure and to permit a limited movement of said-closure independent of said operating mechanism, and means to remotely control said operating "nechanism.

6. An operating means for closures, comprising upright members, an operating arm rigidly attached to said closure and extended in a general direction perpendicular thereto, an expansible supporting structure attached to one of said upright members, and consisting of a lower hinge yoke, and bearing plates having extended bearing arms and having an upper hinge yoke formed integral with one of said bearing plates, means to automatically align said bearing arms and cleats formed integral with and adapted to align said yokes on said upright members, hinging means rigidly attached to said closure and pivotally mounted in said yokes, an operating means associated with said supporting structure, and provided with a pivotally mounted operating lever positioned in juxtaposition with said operating arm, a pitman attached to said lever, and means to reciprocate said pitman to provide a reciprocating movement of said lever in a plane about its pivot, means to automatically stop and secure said operating means at each reciprocation of said pitman, means yieldingly connecting said operating arm and said operating lever to yieldingly overcome the inertia of said closure and to permit a limited movement of said closure independent of said operating mechanism, and means to remotely control the movement of said pitman.

7. An operating means for closures, comprising upright members, an operating armrigidly attached to said closure and extended in a general direction perpendicular thereto, an expansible supporting structure attached to one of said upright members and consisting of a lower hinge yoke, and bearing plates having extended bearing arms,

and having an upper hinge yoke formed in tegral with one of said bearingnplates, means to automatically align said bearing arms, andcleats formed integral with and adapted to align said yokes on said upright members, hinging means rigidly attached to said closure'and pivotally mounted in said yokes, an operating mechanism associated with said supporting structure, and provided with a pivotally mounted operating lever positioned in operable juxtaposition with the operating arm, a shaft rotatably mounted in said bearing plates, a pitman operably attached to said shaft and to said lever, and adapted to provide a reciprocating movement to said lever in a plane about its pivot, and means to rotate said shaft, means toautomatically stop and secure said pitman at each reciprocation, means yieldingly connecting said operating arm and said operating lever to yieldingly overcome the inertia of said'closure and to permit a limited movement of said closure independent of said operating mechanism, and the controlling means attached to said operating means and adapted to remotely control said operating means.

8. An operating meaps for closures, comprising upright members, an operating arm rigidly attached to said closure and extended in a general direction perpendicular thereto, an expansible supporting structure attached to one of the said upright members, and consisting of a lower hinge yoke, and bearing plates having extended bearing arms, said plates being capable of reversal to provide for right or left hand use, and having an upper hinge yoke formed integral with one of said bearing plates, means to automatically align said bearing arms, and cleats formed integral with and adapted to align said yokes on said upright member, hinging means rigidly attached to said closure and pivotally mounted in said yokes, an operating means associated with said supporting structure, and provided with a pivotally mounted operating lever positioned in operable juxtaposition with said opera ing arm. a shaft rotatablv mounted in said bearing arms, a pitman operably attached to said shaft and to said operating lever and adapted to provide a reciprocating movepitman, means to automatically stop and secure said pitman at each reciprocation, means yieldingly connecting said operating arm and said operating leverto yieldingly overcome the inertia of said closure and to 'permit a limited movement of said closure independent of said operating mechanism, and a counter-balanced controlling means attached to and adapted toremotely control saidoperating means.

9. An operating means for closures, com-'- prising upright members, an operating arm i rigidly attached to said closure and extended in azgeneral direction perpendicular thereto,- an expansible supporting structure attached to one ofsaid upright members and consisting of a lower hinge yoke, and'rbearing plates having extended bearing, arms, said plates being capable of reversal to provide for right or left handuse, and having an upper hinge yoke formed integral with one of said hearing plates, means to automatically align said hearing arms, and cleats formed integral with and adapted to align said 'yokes on saidupright member, hinging means rigidly attached to said'closure and pi votally mounted;

in said yokes, an operatingmechanism'asso 203 ciated with said. supportingistructure, and provided with a pivotally mounted operating lever: positioned in operable juxtaposition with the operating arm, a shaft rotatably mounted in said bearing arms, a pitman'oper- 5: iblyattached to said shaft and to said lever,

and adapted to providea reciprocating movement to said lever, and a driving means mountedon saidshaft and consisting of a driving; drum,a cam secured to said shaft, ;.ind acatch hook attachedto said-drum and positioned to engage said cam to impart a single directional-movement to said shaft by a reciprocating movement of said drum,

means to automatically stop and-secure said i 36? 'titman at each reciprocation, means yieldingly connectingsaid operating arm and said operating lever to yieldingly overcome the inertia ofsaid closure and :to permit alimited movement of said closure independent of said 40: operating mechanism, and a controlling meanscomprising; pulling cords attached to said driving drum'and extended for opera tion, means to automatically return said drum' to its normal position, andimeans to guide T "-aidcontrolling means-for remote control of said operating means.

10. An operatingmeansfor closures, comprising upright members, .an 1 operating arm rigidly attached to saidclosureandextended in a general direction perpendicular thereto, an QXPElIlSlblB. supporting structure attached,

to said upright member, andrconsisting ofa, lower hinge yoke, and bearing plates having,

extended bearing arms, said Eplates being-cap- 7' Table of reversal to provide for right or left hand use, and'having an upper hinge yoke formed integral with one of" said bearing plates, means tov automaticallv align said bearing arms, and cleats formed integral with ind adapted to align saidyolr'es-on one of said upright members, hinging-means rigidly attached to said closure and pivotally mountedin-said yokes,an operating mechanism associatediw-ith said supporting structure, and provided with a pivotally-mountedoperating lever positioned in operable juxtaposition with the operating arm, a shaft rotatably mounted in said bearing arms, a pitman oper= ably attached to said shaft ZtIldltO said lever, and adapted to provide a reciprocating movement to said lever, and a driving means mounted on said shaft and consisting'of a driving drum, a cam secured to said shaft and mounted within said drum, and a catch hook attached to said drum and positioned to engage said cam to impart single directional movements to said shaft'at each alternate half revolution of said drum, means to auto.- mat-ically stop and secure said pitman at each reciprocation, means yieldingly connecte ing said operating arm and said operating lever to yieldingly overcome the inertia of said closure and to permit alimited movement ofsaid closure independent of said operating mechanism, a controlling means comprising pulling cords attached to saiddriving drum and extended for operation, a counter-weight adapted to automatically return said drum to its normal position at each one-half revolution thereof, means to guide saidcontrolling meansfor remotecontrol of said operating means, means to automatically secure said'closure in the closed position and means associated with the operating means to automatically release the closure.

An operating means for closures, comprising upright members, anoperating armrigidly attached to said closure andiextended" in a general direction perpendicular thereto,

an expansible supporting structure attached to one of said upright'members and consisting of a lower hinge yoke, and bearing plates having'extended bearing arms, said platesbeing capable of reversal to providefor-right or left hand use, and having an upper hinge yoke formed integral with one oflsaidbearmg plates, means to automatically align-said bearing arms, and cleats formed integralwith and adapted to align saidyokes on said upright member, hinging means rigidly attached to said closure and pivotally mounted in said yokes, an operating mechanism associated with said supporting structure, and provided with; a pivotally mounted operating lever positioned in operable juxtaposition with the operating arm, a shaft rotatablymounted in said bearingarms, avpitmanoperably; attached to said'shaft and" to said lever and adapted to provide a reciprocating movement to said lever, and a driving meansmounted onsaid shaft and consisting of a counterweighted driving drum, adaptedtoautomati Cally-return said drum toaposition of rest,

cam secured to said shaft and mountedv within 1 said drum, a catch hook attached to said drumand positioned to engage said cam to impart a'single directional movementto said'shaft at each alternate half-revolution of said drum, meanstowautomatically stop and secure'said drum at'each reciprocation,

means yieldingly connecting said operating arm and operating lever, a controlling means comprising pulling cords attached to said driving drum and extended for operation, and a latch adapted to secure said closure, means to automatically operate said latch comprising a tripping arm connected with said latch and mounted on said shaft, and means to operate said tripping arm automatically with the movement of said mechanism.

12. An operating means for closures, comprising upright members, an operating arm rigidly attached to said closure and extending in a general direction perpendicular thereto, an expansible supporting structure attached to one of said upright members and consisting of a lower hinge yoke, and bearing plates having extended bearing arms, said plates being capable of reversal to provide for right or left hand use, and having an upper hinge yoke formed integral with one of said bearing plates, means to automatically align said bearing arms, and cleats formed integral with and adapted to align said yokes on one of said upright members, hinging means rigidly attached to said closure and pivotally mounted in said yokes, an operating mechanism associated with said supporting structure, and provided with a pivotally mounted operating lever positioned in operable juxtaposition with the operating arm, a shaft rotatably mounted in said bearing arms, a pitman operably attached to said shaft and to said lever, and adapted to provide a reciproeating movement to said lever, and a driving means mounted on said shaft and consisting of a counter-weighted driving drum adapted to automatically return the drum to a position of rest, a cam secured to said shaft and mounted within said drum, a catch-hook at tached to said drum and positioned to engage said cam to impart a single directional movement to said shaft at each alternate halfrevolution of said drum, means to automatically stop and secure said drum at each reciprocation, means yieldingly connecting said operating arm and operating lever, a controlling means comprising pulling cords attached to said driving drum and extended for operation, a latch mounted on and adapted to secure said closure at each complete movement thereof, means to automatically operate said latch comprising a tripping arm connected with said latch and mounted on said shaft, and provided with an extended tripping lever positioned adjacent to said drum, and means to operate said tripping lever upon the initial movement of said drum.

In testimony whereof I affix my signature.

GUY E. MoGAW. 

